Add more detail to word count UI (#25400)

GitOrigin-RevId: 3521f2ea03332e46ef1bac634ce0650cdce01249

services/web/frontend/extracted-translations.json

@@ -32,6 +32,7 @@
   "about_to_leave_projects": "",
   "about_to_trash_projects": "",
   "about_writefull": "",
+  "abstract": "",
   "accept_and_continue": "",
   "accept_change": "",
   "accept_change_error_description": "",
@@ -209,6 +210,7 @@
   "cant_see_what_youre_looking_for_question": "",
   "caption_above": "",
   "caption_below": "",
+  "captions": "",
   "card_details": "",
   "card_details_are_not_valid": "",
   "card_must_be_authenticated_by_3dsecure": "",
@@ -588,6 +590,7 @@
   "footer_about_us": "",
   "footer_contact_us": "",
   "footer_navigation": "",
+  "footnotes": "",
   "for_enterprise": "",
   "for_government": "",
   "for_individuals_and_groups": "",
@@ -1723,6 +1726,7 @@
   "test_configuration_successful": "",
   "tex_live_version": "",
   "texgpt": "",
+  "text": "",
   "thank_you": "",
   "thank_you_exclamation": "",
   "thank_you_for_your_feedback": "",
@@ -1860,6 +1864,7 @@
   "tooltip_show_filetree": "",
   "tooltip_show_panel": "",
   "tooltip_show_pdf": "",
+  "total": "",
   "total_due_in_x_days": "",
   "total_due_today": "",
   "total_per_month": "",

services/web/frontend/js/features/word-count-modal/components/word-count-client.tsx

@@ -11,8 +11,8 @@ import { debugConsole } from '@/utils/debugging'
 import { signalWithTimeout } from '@/utils/abort-signal'
 import { isMainFile } from '@/features/pdf-preview/util/editor-files'
 import { countWordsInFile } from '@/features/word-count-modal/utils/count-words-in-file'
-import { WordCounts } from '@/features/word-count-modal/components/word-counts'
 import { createSegmenters } from '@/features/word-count-modal/utils/segmenters'
+import { WordCountsClient } from './word-counts-client'
 
 export const WordCountClient: FC = () => {
   const [loading, setLoading] = useState(true)
@@ -59,7 +59,8 @@ export const WordCountClient: FC = () => {
           footnoteWords: 0,
           footnoteCharacters: 0,
           outside: 0,
-          outsideCharacters: 0,
+          otherWords: 0,
+          otherCharacters: 0,
           headers: 0,
           elements: 0,
           mathInline: 0,
@@ -99,7 +100,7 @@ export const WordCountClient: FC = () => {
     <>
       {loading && !error && <WordCountLoading />}
       {error && <WordCountError />}
-      {data && <WordCounts data={data} source="client" />}
+      {data && <WordCountsClient data={data} />}
     </>
   )
 }

services/web/frontend/js/features/word-count-modal/components/word-count-data.ts

@@ -20,6 +20,6 @@ export type WordCountData = ServerWordCountData & {
   footnoteCharacters: number
   abstractWords: number
   abstractCharacters: number
-  // outsideWords: number
+  otherWords: number
-  outsideCharacters: number
+  otherCharacters: number
 }

services/web/frontend/js/features/word-count-modal/components/word-count-server.tsx

@@ -42,7 +42,7 @@ export const WordCountServer: FC = () => {
     <>
       {loading && !error && <WordCountLoading />}
       {error && <WordCountError />}
-      {data && <WordCounts data={data} source="server" />}
+      {data && <WordCounts data={data} />}
     </>
   )
 }

services/web/frontend/js/features/word-count-modal/components/word-counts-client.tsx

@@ -0,0 +1,138 @@
+import { FC, useMemo } from 'react'
+import { WordCountData } from '@/features/word-count-modal/components/word-count-data'
+import { useTranslation } from 'react-i18next'
+import { Container, Row, Col, Form } from 'react-bootstrap-5'
+import OLNotification from '@/features/ui/components/ol/ol-notification'
+import usePersistedState from '@/shared/hooks/use-persisted-state'
+
+export const WordCountsClient: FC<{ data: WordCountData }> = ({ data }) => {
+  const { t } = useTranslation()
+
+  const [included, setIncluded] = usePersistedState<string[]>(
+    'word-count-total',
+    ['text']
+  )
+
+  const items = useMemo(() => {
+    return [
+      {
+        key: 'text',
+        label: t('text'),
+        words: data.textWords,
+        chars: data.textCharacters,
+      },
+      {
+        key: 'headers',
+        label: t('headers'),
+        words: data.headWords,
+        chars: data.headCharacters,
+      },
+      {
+        key: 'abstract',
+        label: t('abstract'),
+        words: data.abstractWords,
+        chars: data.abstractCharacters,
+      },
+      {
+        key: 'captions',
+        label: t('captions'),
+        words: data.captionWords,
+        chars: data.captionCharacters,
+      },
+      {
+        key: 'footnotes',
+        label: t('footnotes'),
+        words: data.footnoteWords,
+        chars: data.footnoteCharacters,
+      },
+      {
+        key: 'other',
+        label: t('other'),
+        words: data.otherWords,
+        chars: data.otherCharacters,
+      },
+    ]
+  }, [data, t])
+
+  const totals = useMemo(() => {
+    const totals = {
+      words: 0,
+      chars: 0,
+    }
+
+    for (const item of items) {
+      if (included.includes(item.key)) {
+        totals.words += item.words
+        totals.chars += item.chars
+      }
+    }
+
+    return totals
+  }, [included, items])
+
+  return (
+    <Container fluid>
+      {data.messages && (
+        <Row>
+          <Col xs={12}>
+            <OLNotification
+              type="error"
+              content={
+                <p style={{ whiteSpace: 'pre-wrap' }}>{data.messages}</p>
+              }
+            />
+          </Col>
+        </Row>
+      )}
+
+      {items.map(item => (
+        <Row
+          key={item.key}
+          style={{
+            borderBottom: '1px solid #eee',
+            padding: 5,
+            marginBottom: 5,
+          }}
+        >
+          <Col
+            style={{
+              display: 'flex',
+              alignItems: 'top',
+              justifyContent: 'space-between',
+            }}
+          >
+            <Form.Check
+              type="checkbox"
+              id={`word-count-${item.key}`}
+              label={item.label}
+              checked={included.includes(item.key)}
+              onChange={event =>
+                setIncluded(prevValue => {
+                  return event.target.checked
+                    ? prevValue.concat(item.key)
+                    : prevValue.filter(key => key !== item.key)
+                })
+              }
+              aria-label={`Include ${item.label} in total`}
+            />
+          </Col>
+          <Col>
+            {item.words} words
+            <br />
+            {item.chars} chars
+          </Col>
+        </Row>
+      ))}
+
+      <Row>
+        <Col style={{ textAlign: 'right' }}>
+          <span style={{ fontWeight: 'bold' }}>
+            {t('total')}: {totals.words} words
+            <br />
+            {totals.chars} chars
+          </span>
+        </Col>
+      </Row>
+    </Container>
+  )
+}

services/web/frontend/js/features/word-count-modal/components/word-counts.tsx

@@ -1,22 +1,12 @@
-import {
-  ServerWordCountData,
-  WordCountData,
-} from '@/features/word-count-modal/components/word-count-data'
-import { useTranslation } from 'react-i18next'
 import { FC } from 'react'
+import { ServerWordCountData } from '@/features/word-count-modal/components/word-count-data'
+import { useTranslation } from 'react-i18next'
 import { Container, Row, Col } from 'react-bootstrap-5'
 import OLNotification from '@/features/ui/components/ol/ol-notification'
 
-export const WordCounts: FC<
+export const WordCounts: FC<{
-  | {
+  data: ServerWordCountData
-      data: ServerWordCountData
+}> = ({ data }) => {
-      source: 'server'
-    }
-  | {
-      data: WordCountData
-      source: 'client'
-    }
-> = ({ data, source }) => {
   const { t } = useTranslation()
 
   return (
@@ -34,69 +24,32 @@ export const WordCounts: FC<
         </Row>
       )}
 
-      {source === 'client' ? (
+      <Row>
-        <>
+        <Col xs={4}>
-          <Row>
+          <div className="pull-right">{t('total_words')}:</div>
-            <Col xs={4}>
+        </Col>
-              <div className="pull-right">Text:</div>
+        <Col xs={6}>{data.textWords}</Col>
-            </Col>
+      </Row>
-            <Col xs={6}>{data.textWords}</Col>
+      <Row>
-          </Row>
+        <Col xs={4}>
+          <div className="pull-right">{t('headers')}:</div>
+        </Col>
+        <Col xs={6}>{data.headers}</Col>
+      </Row>
 
-          <Row>
+      <Row>
-            <Col xs={4}>
+        <Col xs={4}>
-              <div className="pull-right">Headers:</div>
+          <div className="pull-right">{t('math_inline')}:</div>
-            </Col>
+        </Col>
-            <Col xs={6}>{data.headWords}</Col>
+        <Col xs={6}>{data.mathInline}</Col>
-          </Row>
+      </Row>
 
-          <Row>
+      <Row>
-            <Col xs={4}>
+        <Col xs={4}>
-              <div className="pull-right">Captions:</div>
+          <div className="pull-right">{t('math_display')}:</div>
-            </Col>
+        </Col>
-            <Col xs={6}>{data.captionWords}</Col>
+        <Col xs={6}>{data.mathDisplay}</Col>
-          </Row>
+      </Row>
-
-          <Row>
-            <Col xs={4}>
-              <div className="pull-right">Footnotes:</div>
-            </Col>
-            <Col xs={6}>{data.footnoteWords}</Col>
-          </Row>
-        </>
-      ) : (
-        <Row>
-          <Col xs={4}>
-            <div className="pull-right">{t('total_words')}:</div>
-          </Col>
-          <Col xs={6}>{data.textWords}</Col>
-        </Row>
-      )}
-
-      {source === 'server' && (
-        <>
-          <Row>
-            <Col xs={4}>
-              <div className="pull-right">{t('headers')}:</div>
-            </Col>
-            <Col xs={6}>{data.headers}</Col>
-          </Row>
-
-          <Row>
-            <Col xs={4}>
-              <div className="pull-right">{t('math_inline')}:</div>
-            </Col>
-            <Col xs={6}>{data.mathInline}</Col>
-          </Row>
-
-          <Row>
-            <Col xs={4}>
-              <div className="pull-right">{t('math_display')}:</div>
-            </Col>
-            <Col xs={6}>{data.mathDisplay}</Col>
-          </Row>
-        </>
-      )}
     </Container>
   )
 }

services/web/frontend/js/features/word-count-modal/utils/count-words-in-file.ts

@@ -1,4 +1,3 @@
-import { ProjectSnapshot } from '@/infrastructure/project-snapshot'
 import { LaTeXLanguage } from '@/features/source-editor/languages/latex/latex-language'
 import { WordCountData } from '@/features/word-count-modal/components/word-count-data'
 import { NodeType, SyntaxNodeRef } from '@lezer/common'
@@ -8,7 +7,7 @@ import { Segmenters } from './segmenters'
 
 const whiteSpaceRe = /^\s$/
 
-type Context = 'text' | 'header' | 'abstract' | 'caption' | 'footnote'
+type Context = 'text' | 'header' | 'abstract' | 'caption' | 'footnote' | 'other'
 
 const counters: Record<
   Context,
@@ -37,10 +36,15 @@ const counters: Record<
     word: 'footnoteWords',
     character: 'footnoteCharacters',
   },
+  other: {
+    word: 'otherWords',
+    character: 'otherCharacters',
+  },
 }
 
+// https://en.wikibooks.org/wiki/LaTeX/Special_Characters#Escaped_codes
 const replacementsMap: Map<string, string> = new Map([
-  // LaTeX commands that create part of a word
+  // LaTeX commands that create characters
   ['aa', 'å'],
   ['AA', 'Å'],
   ['ae', 'æ'],
@@ -63,19 +67,36 @@ const replacementsMap: Map<string, string> = new Map([
   ['NG', 'Ŋ'],
   ['i', 'ı'],
   ['j', 'ȷ'],
+  // reserved characters
+  ['&', '&'],
+  ['$', '$'],
+  ['%', '%'],
+  ['#', '#'],
   ['_', '_'],
-  // modifier commands for the character in the arguments
+  ['{', '{'],
-  ['H', 'a'],
+  ['}', '}'],
-  ['c', 'a'],
+  // modifier commands for the subsequent character(s) (in braces)
-  ['d', 'a'],
+  ['H', 'ő'], // long Hungarian umlaut (double acute)
-  ['k', 'a'],
+  ['b', 'o'], // bar under the letter
-  ['v', 'a'],
+  ['c', 'ç'], // cedilla
+  ['d', 'o'], // dot under the letter
+  ['k', 'ą'], // ogonek
+  ['r', 'å'], // ring over the letter
+  ['t', 'o͡o'], // "tie" over the two letters
+  ['u', 'ŏ'], // breve over the letter
+  ['v', 'š'], // caron/háček over the letter
   // modifier symbols for the subsequent character
-  ["'", ''],
+  ["'", ''], // acute
-  ['^', ''],
+  ['^', ''], // circumflex
-  ['"', ''],
+  ['"', ''], // umlaut, trema or dieresis
-  ['=', ''],
+  ['=', ''], // macron accent (a bar over the letter)
-  ['.', ''],
+  ['.', ''], // dot over the letter
+  ['`', ''], // grave
+  ['~', ''], // tilde
+  // commands that create text
+  ['TeX', 'TeX'],
+  ['LaTeX', 'LaTeX'],
+  ['textbackslash', '\\'],
 ])
 
 type TextNode = {
@@ -87,7 +108,7 @@ type TextNode = {
 
 export const countWordsInFile = (
   data: WordCountData,
-  projectSnapshot: ProjectSnapshot,
+  projectSnapshot: { getDocContents(path: string): string | null },
   docPath: string,
   segmenters: Segmenters
 ) => {
@@ -106,10 +127,9 @@ export const countWordsInFile = (
   const iterateNode = (nodeRef: SyntaxNodeRef, context: Context = 'text') => {
     const previousContext = currentContext
     currentContext = context
-    const { node } = nodeRef
+    nodeRef.node.cursor().iterate(childNodeRef => {
-    node.cursor().iterate(childNodeRef => {
       // TODO: a better way to iterate only descendants?
-      if (childNodeRef.node !== node) {
+      if (childNodeRef.node !== nodeRef.node) {
         return bodyMatcher(childNodeRef.type)?.(childNodeRef)
       }
     })
@@ -141,34 +161,72 @@ export const countWordsInFile = (
       const child = nodeRef.node.getChild('UnknownCommand')
       if (!child) return
 
-      const grandchild = child.getChild('CtrlSeq') ?? child.getChild('CtrlSym')
+      const grandchild =
+        child.getChild('$CtrlSeq') ?? child.getChild('$CtrlSym')
       if (!grandchild) return
 
       const commandName = content.substring(grandchild.from + 1, grandchild.to)
       if (!commandName) return
 
+      switch (commandName) {
+        case 'thanks':
+          iterateNode(nodeRef, 'other')
+          return false
+      }
+
       if (!replacementsMap.has(commandName)) return
 
+      // TODO: handle accented character in braces after a CtrlSym, e.g. \'{a}
+      // TODO: handle markup within words, e.g. inter\textbf{nal}formatting
+      // TODO: handle commands like \egrave and \eacute
+
       const text = replacementsMap.get(commandName)!
+
       textNodes.push({
         from: nodeRef.from,
         to: nodeRef.to,
         text,
         context: currentContext,
       })
+
       return false
     },
-    BeginEnv(nodeRef) {
+    $Environment(nodeRef) {
-      const envName = content
+      const envNameNode = nodeRef.node
-        ?.substring(nodeRef.from + '\\begin{'.length, nodeRef.to - 1)
+        .getChild('BeginEnv')
-        .replace(/\*$/, '')
+        ?.getChild('EnvNameGroup')
+        ?.getChild('EnvName')
 
-      if (envName === 'abstract') {
+      if (envNameNode) {
-        data.headers++
+        const envName = content
-        iterateNode(nodeRef, 'abstract')
+          ?.substring(envNameNode.from, envNameNode.to)
-        return false
+          .replace(/\*$/, '')
+
+        if (envName === 'abstract') {
+          data.headers++
+
+          const contentNode = nodeRef.node.getChild('Content')
+          if (contentNode) {
+            iterateNode(contentNode, 'abstract')
+          }
+
+          return false
+        }
       }
     },
+    BeginEnv() {
+      return false // ignore text in \begin arguments
+    },
+    Math(nodeRef) {
+      const parent = nodeRef.node.parent
+      if (parent?.type.is('InlineMath') || parent?.type.is('ParenMath')) {
+        data.mathInline++
+      } else {
+        data.mathDisplay++
+      }
+
+      return false // TODO: count \text in math nodes?
+    },
     'ShortTextArgument ShortOptionalArg'() {
       return false
     },
@@ -177,12 +235,6 @@ export const countWordsInFile = (
       iterateNode(nodeRef, 'header')
       return false
     },
-    'DisplayMath BracketMath'() {
-      data.mathDisplay++
-    },
-    'InlineMath ParenMath'() {
-      data.mathInline++
-    },
     Caption(nodeRef) {
       iterateNode(nodeRef, 'caption')
       return false
@@ -201,6 +253,14 @@ export const countWordsInFile = (
         countWordsInFile(data, projectSnapshot, path, segmenters)
       }
     },
+    'BlankLine LineBreak'(nodeRef) {
+      textNodes.push({
+        from: nodeRef.from,
+        to: nodeRef.to,
+        text: '\n',
+        context: currentContext,
+      })
+    },
   })
 
   const preambleExtent = findPreambleExtent(tree)
@@ -226,6 +286,7 @@ export const countWordsInFile = (
     caption: '',
     text: '',
     footnote: '',
+    other: '',
   }
 
   let pos = 0
@@ -240,12 +301,18 @@ export const countWordsInFile = (
   for (const [context, text] of Object.entries(texts)) {
     const counter = counters[context as Context]
 
-    for (const value of segmenters.word.segment(text)) {
+    // TODO: replace - and _ with a word character if hyphenated words should be counted as one word?
+
+    for (const value of segmenters.word.segment(
+      text.replace(/\w[-_]\w/g, 'aaa')
+    )) {
       if (value.isWordLike) {
         data[counter.word]++
       }
     }
 
+    // TODO: count hyphens as characters?
+
     for (const value of segmenters.character.segment(text)) {
       // TODO: option for whether to include whitespace?
       if (!whiteSpaceRe.test(value.segment)) {

services/web/frontend/js/features/word-count-modal/utils/segmenters.ts

@@ -1,5 +1,5 @@
 const wordRe = /['\-.\p{L}]+/gu
-const wordLikeRe = /\p{L}/gu // must contain at least one "letter" to be a word
+const wordLikeRe = /\p{L}/u // must contain at least one "letter" to be a word
 const characterRe = /\S/gu
 
 type SegmentDataLike = {

services/web/locales/en.json

@@ -274,6 +274,7 @@
   "cant_see_what_youre_looking_for_question": "Can’t see what you’re looking for?",
   "caption_above": "Caption above",
   "caption_below": "Caption below",
+  "captions": "Captions",
   "card_details": "Card details",
   "card_details_are_not_valid": "Card details are not valid",
   "card_must_be_authenticated_by_3dsecure": "Your card must be authenticated with 3D Secure before continuing",
@@ -769,6 +770,7 @@
   "footer_contact_us": "Contact us",
   "footer_navigation": "Footer navigation",
   "footer_plans_and_pricing": "Plans & pricing",
+  "footnotes": "Footnotes",
   "for_business": "For business",
   "for_enterprise": "For enterprise",
   "for_government": "For government",
@@ -2234,6 +2236,7 @@
   "test_configuration_successful": "Test configuration successful",
   "tex_live_version": "TeX Live version",
   "texgpt": "TexGPT",
+  "text": "Text",
   "thank_you": "Thank you!",
   "thank_you_email_confirmed": "Thank you, your email is now confirmed",
   "thank_you_exclamation": "Thank you!",

services/web/test/frontend/features/word-count-modal/utils/count-words-in-file.test.ts

@@ -0,0 +1,72 @@
+import { readFile } from 'node:fs/promises'
+import path from 'node:path'
+import { countWordsInFile } from '@/features/word-count-modal/utils/count-words-in-file'
+import { WordCountData } from '@/features/word-count-modal/components/word-count-data'
+import { createSegmenters } from '@/features/word-count-modal/utils/segmenters'
+import { expect } from 'chai'
+
+describe('word count', function () {
+  beforeEach(async function () {
+    this.data = {
+      encode: '',
+      textWords: 0,
+      headWords: 0,
+      outside: 0,
+      headers: 0,
+      elements: 0,
+      mathInline: 0,
+      mathDisplay: 0,
+      errors: 0,
+      messages: '',
+      textCharacters: 0,
+      headCharacters: 0,
+      captionWords: 0,
+      captionCharacters: 0,
+      footnoteWords: 0,
+      footnoteCharacters: 0,
+      abstractWords: 0,
+      abstractCharacters: 0,
+      otherWords: 0,
+      otherCharacters: 0,
+    } satisfies WordCountData
+
+    const content = {
+      'word-count.tex': await readFile(
+        path.join(__dirname, 'word-count.tex'),
+        'utf-8'
+      ),
+    }
+
+    this.projectSnapshot = {
+      getDocContents(path: keyof typeof content) {
+        return content[path]
+      },
+    }
+
+    this.segmenters = createSegmenters('en_US')
+  })
+
+  it('produces correct counts', function () {
+    countWordsInFile(
+      this.data,
+      this.projectSnapshot,
+      'word-count.tex',
+      this.segmenters
+    )
+
+    expect(this.data).to.deep.include({
+      abstractCharacters: 8,
+      abstractWords: 2,
+      captionCharacters: 16,
+      captionWords: 4,
+      footnoteCharacters: 8,
+      footnoteWords: 2,
+      headCharacters: 296,
+      headWords: 52,
+      otherCharacters: 10,
+      otherWords: 2,
+      textCharacters: 193,
+      textWords: 42,
+    })
+  })
+})

services/web/test/frontend/features/word-count-modal/utils/word-count.tex

@@ -0,0 +1,118 @@
+\documentclass{article}
+\usepackage{graphicx}
+\usepackage{amsmath}
+
+\title{The Title} % 2 in headers
+\author{An Author} % 0
+\date{May 2025} % 0
+
+\begin{document}
+
+\maketitle % 0
+
+\thanks{bleep bloop}
+
+\begin{abstract}
+Word word % 2 in abstract
+\end{abstract}
+
+\section{plain text}
+Word word % 2
+
+\section{accents}
+w\'ard w\`erd w\"ird w\~ord w\.urd w\^ord % 6
+
+\section{accents with groups}
+% w\'{a}rd w\`{e}rd w\"{i}rd w\~{o}rd w\.{u}rd w\^{o}rd w\c{o}rd w\u{o}rd % 8 % TODO
+
+\section{grouped single character command}
+% w{\o}rd w\~{\o}rd % 2 % TODO
+
+\section{commands that create characters}
+\o\oe\aa\AE % 1
+
+\subsection{with braces}
+w\o{}rd w\oe{}rd w\aa{}rd w\AE{}rd % 4
+
+\subsection{with spaces}
+w\o rd w\oe rd w\ae rd w\AE rd % 4
+
+\section{symbols}
+\S{} \P{} % 0
+
+\section{formatting}
+\textit{italic} \textbf{bold} \textit{\textbf{bold italic}} % 4
+\texttt{teletype} \textsf{sans-serif} \textsc{small caps} % 4
+\textsf{-} % 0
+
+\section{formatting inside word}
+% wo\textit{italic}rd %1 % TODO
+
+\section{commands that create text}
+\textbackslash{}word \LaTeX{} % 2
+
+\section{special characters}
+word\&word \$word word\% \#word wo\_rd \{word\} % 7
+
+\section{footnote}
+\footnote{word word} % 2 in footnote
+
+\section{headers}
+\part{word} % 1
+\chapter{word} % 1
+\section{word} % 1
+\subsection{word} % 1
+\subsubsection{word} % 1
+\paragraph{word} % 1
+
+\section{verbatim}
+\verb|word word word| % 0
+
+\section{list}
+\begin{itemize}
+    \item word % 1
+    \item word % 1
+\end{itemize}
+
+\section{figure}
+\begin{figure}
+    \includegraphics[width=0.5\linewidth]{example.png} %0
+    \caption{Word word} %2 in captions
+\end{figure}
+
+\section{table}
+\begin{table}
+    \begin{tabular}{c|c}
+       word & word \\ % 2
+       word & word % 2
+    \end{tabular}
+    \caption{Word word} % 2 in captions
+\end{table}
+
+\section{line break}
+word\\word % 2
+
+\section{inline math}
+$2+3=5$ % 0
+
+\section{display math}
+\[2+3=5\]
+
+\begin{equation}
+    2+3=5
+\end{equation}
+
+\begin{equation*}
+    2+3=5
+\end{equation*}
+
+\begin{align*}
+2x - 5y &=  8 \\
+3x + 9y &=  -12
+\end{align*}
+
+\section{text in math}
+
+$ 2+3 \text{ is equal to } 5 $
+
+\end{document}